cpuset_copyout
.cpuset_copyout = copyout32_set
.cpuset_copyout = cpuset_copyout
.cpuset_copyout = copyout
error = cb->cpuset_copyout(mask, maskp, size);
error = cb->cpuset_copyout(mask, maskp, domainsetsize);
int (*cpuset_copyout)(const void *, void *, size_t);